*{
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}
.box{
    width: 500px;
    margin:  0 auto;
    position: relative;
    /* background-color: skyblue; */
}
.banner{
    margin: 0 auto;
    width: 500px;
    height: 300px;
    overflow: hidden;
}
/* @keyframes play {
    from {
        transform: translateX(0)
    }

    to {
        transform: translateX(-2000px);
    }
} */
.banner ul{
    margin: 0 auto;
    width: 2000px;
    height: 300px;
    display: flex;
    animation: play 7s steps(4) infinite;
}
.banner img{
    width: 500px;
    height: 300px;
}
.jumpBtn{
    width: 65px;
    margin: 0 auto;
    cursor: pointer;
    /* border: 1px solid #333; */
}
.jumpBtn li:active {
    background-color: slategray;
    opacity: 0.4;
}
.jumpBtn>ul>li{
    width: 10px;
    height: 10px;
    display: inline-block;
    border: 1px solid #333;
    border-radius: 10px;
    cursor: pointer;
}
.left{
    position: absolute;
    width: 30px;
    height: 60px;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    cursor: pointer;

}
.left:hover{
    background-color: #888;
    opacity: 0.4 ;
}
.left li{
    line-height: 60px;
    font-size: 32px;
}
.right{
    position: absolute;
    width: 30px;
    height: 60px;
    top: 50%;
    transform: translateY(-50%);
    right: 0;
    cursor: pointer;
}
.right:hover{
    background-color: #888;
    opacity: 0.4 ;
}
.right li{
    line-height: 60px;
    font-size: 32px;
}
